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|Title:||Sliding wear behavior of in situ Al-4.5Cu-5TiB2 composite processed by single and multiple roll passes in mushy state|
Metal matrix composite
|Abstract:||A comparative study has been carried out on dry sliding wear behavior of in situ Al-4.5Cu-5TiB2 composite subjected to single or multiple mushy state roll passes, each to 5% thickness reduction at 626�C (temperature for 20% liquid). The results of wear tests using a pin-on-disc machine under normal loads of 20 or 40N have been analyzed to determine wear rate, friction and wear coefficients. It has been found that wear resistance of rolling surface is superior to that of long-transverse surface, and improves on subjecting composites to higher number of roll passes, which cause enhancement of hardness through grain refinement and particle redistribution. Studies of surfaces and cross-sections of worn specimens as well as wear debris have shown evidence of Fe-enrichment, plastic deformation and work hardening. Surface roughness and friction coefficients depend on wear mechanisms, which appear to be influenced by applied load and specimen hardness. � 2011 Elsevier B.V.|
|Appears in Collections:||Research Publications|
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